SU489347A3 - The method of obtaining paraffins - Google Patents

Description

The invention relates to a method for obtaining P. from paraffinic hydrocarbons from petroleum products.

A method of producing paraffins by complexing ri-paraffin I hydrocarbons contained in petroleum products with water with urea solutions is known, and organic liquids with a specific gravity greater than the specific gravity of the complex are used as a solvent, initially producing a coarse-grained complex separated and washed with a solvent on SIT-, followed by iamel. this complex with intensive: stirring (method of abrasion) in a solvent medium at a temperature below the complexation complex, repeating this operation to obtain pure: h, paraffins, followed by separation of the filter; from the complex and decomposition of the complex; ca.

Such a method is harvested in the form of a complex according to the method of testing in several stages to achieve purity h. paraffins of 99.5% and by-pass washing to тегaning of the washing system р., about 120 ° C and below, which requires; significant (operational and energy costs.

The purpose of the invention is to simplify the process 5 and the higher purity of the released in-parifins,

This is achieved by using Cg - C hydrocarbons mixed with 10 vol%, the ketone is used as an organic boron solvent, and the complex is washed at a temperature higher than the complexation complex temperature and lower than the decomposition temperature of the complex, followed by cooling the complex to complex temperature 5; The complex is usually washed; but it is carried out: at a temperature from 4O to 6O SG I The oil product diluted with a organic solvent or a mixture of solvents is treated with urea or Nysy20; a solution of urea at a higher temperature, from 2 ° C; to 4 ° C to obtain a fine-crystalline I-powder complex, then the obtained I-powdered set: ks washing) -. 25 I with fresh solvent, reaction mixture

before it is heated, the solvent is removed from it and the complex is decomposed into pure I-paraffins. V

It can be used as a solvent for hydrocarbons.

- C | - C |, such isopenta, hexane and benzene, with a concentration of 5-35 o5.% Of ketone, grg for an appropriately mg tmpyboxylic acid. | Mixes of mW "le.zobutn / 1 of a ketone with cg-Ca matrices in water are lighter than poro-picking Kor / njieKca in contrast to solvents according to the known method.

Washing KOMjmeKce can be done C (.; YinecTS) not only with a liquid solvent, but also by introducing solution solutions, partially condensed and heated partially with KOMiUieKC to 4G-60 C.

Cooling to the complexation temperature is carried out by evaporating the required quantities of liquid butane / or other light carbohydrates or by extracting refrigerants.

The solvent mixtures according to the present invention are much: t) cheaper and HEALTH.

Example. The raw material of nlgetg.y is light gas oil, which boils within the range of 21O i315.C, with a total content of p-loops of 16 wt.%. 10O vol.% Of this Taoil mix with 330 vol.% Of the mixture, consisting of

1nz 300 vol.% Hexan or benzach and ZO | Vol.% Methylt 3butt1ketone (91 Oi5.% T j 9 vol.% To the solvent mixture goat; sgEen o). gas oil and solvent Process ({EG vol.% for raw materials) by scrubbing at 7 ° C with aqueous carbam g dc: -. m; solution.

Small cocciishx 1 is obtained with an average grain size less than 0, .1 I mm. This complex is designated in teblida: the sign of R.

i Koshlex filtering unit and (ZZS vol.%. in terms of gas oil); fresh mixture of solvents. Volyga 1 washed complex noABeprsKJT is an extraneous method of izvizomau way at 30 C; s so said treatment of prop. t: t at 4 o or 6 o C (each time 3 microns) and the complex is filtered at the same temperature and then decomposed at temperature up to s 3 C with the addition of water, and the solvent is evaporated from this paraffin phase Determining the OTy number of the tg-haparafIOB mixture (see Table 1)

T a b l and E a 1

1 1009О rtKcaiii ЗОО Methyl- ЗО | thirty

zobutylZO 13.7 85.7 97.0

Experiments show that by increasing the temperature of the washing from 30 to 40 60 C, the efficiency of paraffins improves, however this is associated with a decrease in their output.

i Example 2, In experiments 7-12, introduced - 1 Some of them were compared with experiments 1-6 of 1, namely: in 11 and 1.2 instead of aqueous saturated rasiTBOpa of carbamide, 67 g of crista is used; lly cheskog-karby / gpda per 100 ml gas oil; iTeivfflepaTyp is a com plexus of the formation of composition 1E; KET 25 C; the treatment of the suspension (yromyE "| ku) was carried out in experiments 7.9 and 11 prtg 25 C, and in experiments 8s 10, IP jCornacEO and aao: jpeT" KiiiOj after gravity

When the detector is reconditioned, the complex is re-formed: at 25 ° C and contact time: o min.

 To re-experiment the experiments are carried out, 2. Thus, according to the invention, the invention (og & 1t C 10 and 12) reaches a paraffin purity of more than 99 Bes.% Code of nacacbmia in terms of both gas oil and the potential content of B f% - -napad) KiiOB, amounting to 16% WLO: in .x 8DO and 12 is slightly lower than; P experiments 7,8 and 11, which is compensated for, start: with a higher purity of celeF O .. -O. Product,

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raw materials with a boiling point of 210-315 ° C are diluted 180 vol. h. isopentane and 2O 1-6 h. methyl isobutyl ketone and treated with 6O vol. CHO saturated prt 70 C of an aqueous solution of urea, Tefperaflex of the complex of B-eni 2O C. Obtain the powder, then ;; tsp x, which break 200 vol. . 96.5%,%, To the part of the complex of the complex is added the same mixture of isopectane and methyl isobutyl ketone, while stirring, the RO is heated for 3 minutes, after which it is immediately cooled by 20C by addition and evaporation: like. b; 7taka and, stirring, pulling; follow & TetjsHHe for 5 minutes at an eZi temperature. After the loroshculed complex has been obtained and decomposed, {paraffin with a purity of 98j8 wt% is isolated. P

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G: mn; -hh lrmleru 3, c6pa5arbiHa "jT yistil-

The fraction of raaofinsj that vyktychayuschaya in {within 275-315 C. When processing suspension peneii complex lri, Oh With get parafKE with a purity of 97 HRV.%.

When processing the suspension according to the invention, at 50.1 and post-dummy nome Gkompleksoobraeovan n at 20 C get paoabkn with a weight of 99 weight,%

1 PRI me R 5, When the condition of example S I is about 100 h, spun with a spindle, and 317 "42 ° C, dissolve 180 h. hexane, n 2O about, h, marked | zobugkletopopa, process 50 about, h.

native solution-, amide amide (saturated Iri 70 C) "/ reNmepaTypa complex; Zovanp 35 C; A powder complex is obtained. When the suspension is processed at 35 ° C., iarafmp c1Chistotses 97.0 wt.% Are obtained. The treatment of the complex with a mixture of rastborm-gel (Sivftm at 60 s) | and a 35 ° C pontor complex (the contact time is 5 MTIH | paraffin 98 with purity; 6 Bessc%.

I Example 6. Under conditions similar to analogous; 3.-5, the processing of the suspension (the Complex in the sprouts of the c of the destructive jl are mixed in pairs of the mixture of solvents with tvglterate- private condensation account ciMecii ptcTEopHreneli reach Keob5-x

; KH,

The purity of the obtained paraffins is the same as in the examples (when processed with a mixture of solvent).

 Example 7 Yoluchennye to prnryu:, „b suspension of the complex from

oils containing 15 Bass,% of complexing agents, are separated in a single-centrifugal, reef (type CC A from Westphali Sepa AG, Elda) on. powder complex

 The weight of g / ml) and the filtrate of a single-oil oil Sud.ves O; 69 g / ml). When decomposed, a sample of unwashed coxplex gives paraffin with an oil content of 5% by weight, J4TO corresponds to ft-paraffin purity

gjQ ABOUT 90. After separation of the filtrate, the npoMHsajor complex in the conical section of the separator screw is 20 vol.% (In terms of the complex) fresh solvent (90 vol.%, I-penthenna and 10 vol.% Methyl isobutyl ketone). The complex is then separated from the washing agent by centrifugation,: In the complex, after the reactor is left (about 10 ° of the washing agent. (A part of the washed complex is subjected to (decomposition. The resulting 08% steam)

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r: fin has a purity of about 95 wt.%. Another part of the washed complex is heated in the drying zone of the separator E for 5 Mfss to 5 ° C by introducing solvent vapors, which condense in the drying zone. Immediately after that, the suspension of the complex in the solvent is transferred into a vessel for complexation by adding liquid evaporating butane, cooled with stirring to 20 ° C for 5 min. W. de at this temperature, after 1 hour immediately razdane in the center again | fugue The separated complex is decomposed; with water at a temperature of 85 ° C. At the same time (Paraffin is obtained with an oil content of 11.9% (purity of L-11araffin is about 98 wt.% | solvent, paraffin is obtained with a purity of 96.7 wt.%. The centrifuge drum has a speed of 4000 to 5000 rpm and a screw is 60 rpm higher. 47 110 I The subject matter of the invention. -...--. .1. The method of obtaining iri-paraffin in the way of processing oil product with crystalline urea or its solution in the presence of .Bi organic processing a solvent with the formation of a powdered complex; carbamide with n-paraffins, followed by separation of the complex, washing it with an organic solvent and decomposition from you: d-paraffins, is distinguished so that, in order to understand the purity of the excretion and to simplify the process, Cs – C hydrocarbons in a mixture with 5.35 vol.% of ketone and the complex are washed with pH at a temperature higher than the temperature of complexing and below the decomposition of the complex, followed by cooling. plex up to (n komlleksoobraaova temperatures. 2. The method according to p. 1, about gl and h, yi i y and with the fact that the complex is washed with 1, at 40-60 ° C.